CN1450280A - Method for manufacturing eccentric rotating shaft of compressor - Google Patents
Method for manufacturing eccentric rotating shaft of compressor Download PDFInfo
- Publication number
- CN1450280A CN1450280A CN03109065A CN03109065A CN1450280A CN 1450280 A CN1450280 A CN 1450280A CN 03109065 A CN03109065 A CN 03109065A CN 03109065 A CN03109065 A CN 03109065A CN 1450280 A CN1450280 A CN 1450280A
- Authority
- CN
- China
- Prior art keywords
- eccentric rotor
- eccentrically weighted
- weighted shaft
- welding
- compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 89
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 56
- 238000003466 welding Methods 0.000 claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 238000005242 forging Methods 0.000 claims abstract description 16
- 230000006698 induction Effects 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229910000754 Wrought iron Inorganic materials 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000005304 joining Methods 0.000 claims 1
- 238000005520 cutting process Methods 0.000 abstract description 2
- 238000005266 casting Methods 0.000 description 5
- 239000011148 porous material Substances 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
- B21K1/08—Making machine elements axles or shafts crankshafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/10—Piercing billets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/12—Forming profiles on internal or external surfaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Forging (AREA)
Abstract
The eccentric shaft of a compressor is manufactured by a pipe making process, a drawing process and a cutting process; the eccentric rotor part is manufactured by using another steel bar or steel pipe through the forging process of the eccentric rotor part; welding and perforating the shaft part and the eccentric rotor part; and turning the eccentric rotor part to integrally complete the manufacture of the eccentric rotating shaft of the compressor. The present invention also provides another way in which the eccentric rotor portion piercing operation can be omitted. When the eccentric rotor part is manufactured, the eccentric rotor part of a steel rod or a steel pipe is heated and then is pressed to form the eccentric rotor, an embedded hole with one side opened is formed in the axis of the eccentric rotor part, the shaft part and the eccentric rotor part are welded into a whole by a current induction welding mode, and the eccentric rotor part is turned to finish the manufacture of the eccentric rotating shaft of the compressor. The invention has simple operation, and can realize mass production and improve the production efficiency. Therefore, the wear-resistant steel has the characteristics of high hardness and outstanding wear resistance, thereby improving the product quality and prolonging the service life of the product.
Description
Technical field
The present invention relates to compressor in a kind of air-conditioning or the refrigerator, particularly a kind of manufacture method of compressor eccentrically weighted shaft.
Background technique
Eccentrically weighted shaft plays a part back and forth movement converted to and rotatablely moves in general.Be formed with eccentric rotor 2 as shown in Figure 1 on the select location of a side, connect the respective end of connecting rod, the outside of above-mentioned eccentric rotor 2 forms drum simultaneously.On eccentrically weighted shaft 1, will load onto bearing sliding friction will be changed into pivoting friction, reduce resistance to motion with this.Connecting eccentrically weighted shaft 1 axle direction perforation back formation opening 3 in addition can allow refrigerant circulate.
The manufacture method of traditional eccentrically weighted shaft 1 is based on casting technique.Process chart as shown in Figure 2, it comprises casting process, groove manufacturing procedure, turning operation, perforation process and secondary manufacturing procedure.Casting process is cast into mold to the metal after fusing, and forms eccentrically weighted shaft (round steel bar) after a period of time cooling.For the axle that casting process is cast is fixed, thereby carry out turning operation easily, carry out the groove manufacturing procedure, machined grooves on the axle two ends.Turning operation afterwards is that axle is carried out lathe processing.Perforation process is pressed the section roller after the turning operation perforation of internal diameter specification with deep hole drill and is formed opening 3.Secondary manufacturing procedure is processed (boring, eccentric CUT, benchmark key seat) on request to the axis body of the various axles after the perforation operation.
This traditional method has the foundry goods characteristic.Be that foreign matter is contained in inside, a lot of pores etc. take place, thereby reduce wear resistance, the consequence that causes quality to descend.
In addition, because of casting process and perforation process and turning operation a lot of activity durations of needs, thereby reduce manufacturing efficiency, the manufacturing efficiency reduction can cause original cost to rise inevitably, and its problem points is very serious.
In order to address the above problem, the applicant accepts in the patent application of No. the 000078th, book in Korea S's patent of invention, has proposed the patent application that a kind of name is called " eccentrically weighted shaft and motor shaft manufacture method ".
Summary of the invention
Technical problem to be solved by this invention is, in order to overcome the deficiency of traditional eccentrically weighted shaft manufacture method, according to the follow-up invention that above-mentioned invention formerly proposes, also is relevant above-mentioned another embodiment's of invention invention formerly.Promptly providing a kind of is the manufacture method of purpose compressor eccentrically weighted shaft to make eccentrically weighted shaft by simple flow chart.
The technical solution adopted in the present invention is: a kind of manufacture method of compressor eccentrically weighted shaft is to be finished by following operation: 1) tubulation operation: after raw sheet is pressed the certain specification cut-out, be molded into catheter shape, weld after surface of contact joins; 2) stretching process: the major axis shape steel pipe that forms through above-mentioned tubulation operation is stretched to length direction, make it meet roughing stage size; 3) cut off operation: the steel pipe behind above-mentioned stretching process, press the eccentrically weighted shaft specification and cut off, finish the cut-out of axial region; 4) forging process: press rod iron or the steel pipe that certain-length cuts off with another, after its eccentric rotor position was with the temperature local heating more than 700 ℃, the compression and moulding eccentric rotor made it have required specification and shape, thereby finishes the forging of eccentric rotor portion; 5) welding process: with axial region and eccentric rotor portion with the induction by current welding manner integrally welded after, finish the welding of eccentrically weighted shaft shape; 6) perforation process: behind the above-mentioned welding process, the back of boring a hole in eccentric rotor portion forms opening, and it is communicated with the opening of axial region; 7) manufacturing procedure: behind the above-mentioned perforation process, carry out turning, form positions such as various key seats, finish the turning processing operation of eccentrically weighted shaft at last at the eccentric rotor position.
In addition, the present invention also provides under the situation of omitting the perforation operation of eccentric rotor portion, makes the another way of eccentric rotor.Be to finish: 1) tubulation operation: after former steel plate is pressed the certain specification cut-out, be molded into catheter shape, welding after surface of contact joins by following operation; 2) stretching process: the major axis shape steel pipe that forms after above-mentioned tubulation operation is stretched to length direction, make it meet roughing stage size; 3) cut off operation: the steel pipe behind above-mentioned stretching process, press the eccentrically weighted shaft specification and cut off, finish the cut-out of axial region; 4) forging process: press rod iron or the steel pipe that certain-length cuts off with another, after its eccentric rotor position is with the temperature local heating more than 700 ℃, the compression and moulding eccentric rotor, make it have required specification and shape, form the open inlaid hole of a side afterwards in its axle center, thereby finish the forging of eccentric rotor portion; 5) welding process: axial region and eccentric rotor portion finish the welding of eccentrically weighted shaft shape after using the induction by current welding manner integrally welded; 6) manufacturing procedure: behind the above-mentioned welding process, carry out turning, form positions such as various key seats, finish the turning processing of eccentrically weighted shaft at last at the eccentric rotor position.
According to the present invention,, thereby can set up the production system of production in enormous quantities because of flow chart is simple.Reduce and the reducing of production time because of original cost, can enhance productivity.Simultaneously, because of the pore in the traditional approach, foreign matter etc. can not take place.Therefore, have high hardness, the exsertile characteristics of wear resistance, thus improve the quality of products, prolong product working life.
Description of drawings
Fig. 1 a, Fig. 1 b are with traditional eccentrically weighted shaft manufacture method schematic representation.
Fig. 2 is manufacturing process's flow chart of traditional eccentrically weighted shaft;
Fig. 3 a, Fig. 3 b are eccentrically weighted shaft manufacture method first embodiment's schematic representation provided by the invention;
Fig. 4 is manufacturing process's flow chart of eccentrically weighted shaft of the present invention;
Fig. 5 a, Fig. 5 b are eccentrically weighted shaft manufacture method second embodiment's schematic representation of the present invention;
Fig. 6 is manufacturing process's flow chart of eccentrically weighted shaft manufacture method second embodiment provided by the invention.
Fig. 7 is eccentrically weighted shaft manufacture method the 3rd embodiment's schematic representation provided by the invention.
Wherein:
1,10,20,30: eccentrically weighted shaft 2: eccentric rotor
3: opening 11,12: axial region
12,22: eccentric rotor portion 23: embedded groove
Embodiment
Provide specific embodiment below in conjunction with accompanying drawing, further specify the present invention and how to realize.
The present invention at first will solve the problem points that traditional manufacture occurs on manufacture method, as pore taking place, the problem that wear resistance descends and complicated flow chart brings.On major axis, form opening in traditional manufacture method, can allow refrigerant circulate with deep hole drill perforation back.The present invention is processed into major axis to steel plate shown in Fig. 3 a, Fig. 3 b.By stretching process, this conduit is stretched then, and form axial region 11 by specification cut-out back.Simultaneously, integrally welded through the eccentric rotor portion 12 and the axial region 11 that forge operation formation.The present invention is to be the eccentrically weighted shaft manufacture method of key character with the foregoing.
The method of making eccentrically weighted shaft according to the present invention is described in detail as follows respectively by operation.
1) tubulation operation
The tubulation operation is divided into cut-out, moulding, welding three phases.At first, cut off by conduit (eccentrically weighted shaft) specification having certain thickness steel plate.For the quality that guarantees to weld, earlier it is shaped to catheter shape, face of weld can be in contact with one another.Face of weld is in contact with one another, welds in the resistance welding mode.
According to this tubulation operation, can form opening 3 along the length direction automatically in eccentrically weighted shaft 10 inside, the perforation operation in the traditional approach need not be carried out again, thereby the perforation inconvenience that operation brought can be solved fully.
That is, when carrying out the tubulation operation, the meeting nature forms the opening 3 of the refrigerant that can circulate in the axle center.
2) stretching process
The goods with steel pipe shape through forming after the tubulation operation all have residual mechanical stress usually in the welding part, make it have bigger hardness than mother metal matter.In order to eliminate this residual mechanical stress, before stretching process, want advanced column criterion heat-transmission to be treated to suitable.
After the standardization heat treatment, eccentrically weighted shaft shape steel pipe is clamped with external diameter screw die and internal diameter pin, stretched, finally make it meet roughing specification (internal diameter, mechanical property) to Way out.
The purpose of above-mentioned stretching is in order to satisfy the requirement of mechanical property, and improves the precision of size, improves the surface state of goods.
3) cut off operation
The long steel pipe that the drawn operation is made, by finished product promptly: the specification of eccentrically weighted shaft requirement is cut off with cutting machine, finishes axial region processing.
This is the operation that forms axial region 11 through tubulation operation → stretching process → cut-out operation.Wherein, axial region 11 is important composition parts of eccentrically weighted shaft 10.
4) forging process
Eccentrically weighted shaft 10 is combined into one eccentric rotor portion 12 and forms with above-mentioned axial region 11.In order to make this eccentric rotor portion 12, forge operation.Specifically: cut into the rod iron or the steel pipe of certain-length with another, form the position at its eccentric rotor, after the temperature local heating more than 700 ℃, compression and moulding eccentric rotor 2, make it have required specification and shape, thereby finish the forging of eccentric rotor portion 12.That is, when loading onto bearing, form the eccentric rotor that combines with connecting rod at the position of the eccentric rotor of rod iron or steel pipe.
5) welding process
Through axial region 11 that tubulation operation → stretching process → the cut-out operation is finished and the eccentric rotor portion 12 that finishes through forging process, to after connecting, after usefulness induction by current welding manner is integrally welded, finish the processing of eccentrically weighted shaft shape mutually.
6) perforation process
Carry out the eccentrically weighted shaft 10 finished behind the above-mentioned welding process, on axial region 11, formed opening.At this moment, there is not opening 3 in eccentrically weighted shaft portion 12 if when making material with rod iron.And eccentrically weighted shaft portion 12 is if when making material with steel pipe, and opening 3 can be blocked in forging process.
Axle direction in above-mentioned eccentric rotor portion 12 is bored a hole into opening 3, and its opening 3 is communicated with the opening 3 of axial region 11.
7) manufacturing procedure
According to the present invention, flow chart is simple, has reduced the actual production time, and the wear-resisting property of product protrudes simultaneously, thereby has overcome the problem that traditional manufacture is brought fully.And then the quality and the manufacturing efficiency of product have been improved greatly.
In addition, the present invention can make needed eccentrically weighted shaft 10 through 7 stage procedures such as tubulation operation, stretching process, cut-out operation, forging process, welding process, perforation process, turning manufacturing procedures, simultaneously, as shown in Figure 6, can also remove perforation process, promptly also can make needed eccentrically weighted shaft 20 through 6 stage procedures such as tubulation operation, stretching process, cut-out operation, forging process, welding process, turning manufacturing procedures.
At this moment, shown in Fig. 5 a, Fig. 5 b, form eccentric rotor 2 through forging process, simultaneously, the axle center of eccentric rotor portion 22 forms the open embedding groove 23 of a side, finishes eccentric rotor portion 22 with this.
As mentioned above, after embedding groove 23 is finished in eccentric rotor portion 22 axle center, axial region 21 outsides are embedded in the embedding groove 23 of eccentric rotor portion 22, integrally welded axial region 21 and embedding groove 23 usefulness induction by current welding manners, thus finish eccentrically weighted shaft 20.
Along with the outside and the eccentric rotor portion 22 of axial region 21 are integrally welded, needn't carry out the perforation operation of opening 3 in eccentric rotor portion 22.So the eccentrically weighted shaft of finishing behind the welding process can directly enter the turning manufacturing procedure under the situation of omitting perforation process.Therefore, can simplify flow chart.
In addition, the eccentrically weighted shaft that above-mentioned described eccentrically weighted shaft is the idle call compressor among the present invention, the another embodiment that Fig. 7 provides for invention, that is: the refrigerator manufacture method of compressor eccentrically weighted shaft 30.This manufacture method is identical with idle call compressor eccentrically weighted shaft manufacture method, and just eccentrically weighted shaft 30 shapes are different.
Claims (7)
1. the manufacture method of a compressor eccentrically weighted shaft is characterized in that it being to be finished by following operation:
1) tubulation operation: after former steel plate pressed certain specification and cut off, be shaped to the steel pipe shape, weld after surface of contact joins;
2) stretching process: the major axis shape steel pipe that forms through above-mentioned tubulation operation is stretched to length direction, make it meet roughing stage size;
3) cut off operation: the steel pipe behind above-mentioned stretching process, press the eccentrically weighted shaft specification and cut off, finish axial region and cut off;
4) forging process: press a kind of in rod iron that certain-length cuts off or the steel pipe with another, after its eccentric rotor position is with the temperature local heating more than 700 ℃, the compression and moulding eccentric rotor makes it have required specification and shape, thereby finishes the forging of eccentric rotor portion;
5) welding process: with axial region and eccentric rotor portion with the induction by current welding manner integrally welded after, finish the welding of eccentrically weighted shaft shape;
6) perforation process: behind the above-mentioned welding process, the back of boring a hole in eccentric rotor portion forms opening, and it is communicated with the opening of axial region;
7) manufacturing procedure: behind the above-mentioned perforation process, carry out turning, form positions such as various key seats, finish the turning processing of eccentrically weighted shaft at last at the eccentric rotor position.
2. the manufacture method of compressor eccentrically weighted shaft according to claim 1 is characterized in that, the welding manner of tubulation operation is the resistance welding mode.
3. the manufacture method of compressor eccentrically weighted shaft according to claim 1 is characterized in that, before stretching process, in order to eliminate the residual mechanical stress of surface of contact welding part, carries out standardization heat treatment after the process tubulation operation.
4. the manufacture method of a compressor eccentrically weighted shaft is characterized in that it being to be finished by following operation:
1) tubulation operation: after former steel plate pressed certain specification and cut off, be molded into catheter shape, the surface of contact back welding of joining;
2) stretching process: the major axis shape steel pipe that forms after above-mentioned tubulation operation is stretched to length direction, make it meet roughing stage size;
3) cut off operation: the steel pipe behind above-mentioned stretching process, press the eccentrically weighted shaft specification and cut off, finish the cut-out of axial region;
4) forging process: press rod iron or the steel pipe that certain-length cuts off with another, after its eccentric rotor position is with the temperature local heating more than 700 ℃, the compression and moulding eccentric rotor, make it have required specification and shape, form the open inlaid hole of a side afterwards in its axle center, thereby finish the forging of eccentric rotor portion;
5) welding process: axial region and eccentric rotor portion finish the welding of eccentrically weighted shaft shape after using the induction by current welding manner integrally welded;
6) manufacturing procedure: behind the above-mentioned welding process, carry out turning, form positions such as various key seats, finish the turning processing of eccentrically weighted shaft at last at the eccentric rotor position.
5. the manufacture method of compressor eccentrically weighted shaft according to claim 4, it is characterized in that, the axial region outside is embedded in the eccentric rotor portion embedding groove, integrally welded axial region and embedding groove with the induction by current welding manner, thereby omitted the perforation operation that forms opening in eccentric rotor portion, directly entered the turning manufacturing procedure.
6. the manufacture method of compressor eccentrically weighted shaft according to claim 4 is characterized in that, the welding manner of tubulation operation is the resistance welding mode.
7. the manufacture method of compressor eccentrically weighted shaft according to claim 4 is characterized in that, before stretching process, in order to eliminate the residual mechanical stress of surface of contact welding part, carries out standardization heat treatment after the process tubulation operation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020030004356 | 2003-01-22 | ||
| KR1020030004356A KR20040067313A (en) | 2003-01-22 | 2003-01-22 | Making method of crankshaft for compressor |
| KR20030004356 | 2003-01-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1450280A true CN1450280A (en) | 2003-10-22 |
| CN1228555C CN1228555C (en) | 2005-11-23 |
Family
ID=28786991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031090656A Expired - Fee Related CN1228555C (en) | 2003-01-22 | 2003-04-03 | Method for mfg of eccentral rotary axle of compressor |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20040067313A (en) |
| CN (1) | CN1228555C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108723722A (en) * | 2018-06-29 | 2018-11-02 | 浙江百达精工股份有限公司 | A kind of rotary compressor bent axle blank manufacturing method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101128579B1 (en) * | 2005-01-26 | 2012-03-27 | 엘지전자 주식회사 | A manufacturing process of crank shaft for a rotary compressor |
| KR20160147327A (en) | 2015-06-15 | 2016-12-23 | (주)성진포머 | Manufacturing method of eccentric shaft for compressor by automatic cold forging process |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59209441A (en) * | 1983-05-12 | 1984-11-28 | Toshiba Corp | Production of shaft for compressor |
| JPS63224826A (en) * | 1987-03-13 | 1988-09-19 | Sumitomo Metal Ind Ltd | Manufacture of rim for wheel for automobile |
| JPH01148474A (en) * | 1987-12-03 | 1989-06-09 | Toshiba Corp | Manufacture of crank shaft |
| JPH0315609A (en) * | 1989-06-12 | 1991-01-24 | Mazda Motor Corp | Manufacture of assembly cam shaft |
| JP2767323B2 (en) * | 1991-01-22 | 1998-06-18 | 日野自動車工業株式会社 | Method and apparatus for manufacturing camshaft |
| JPH05221203A (en) * | 1991-09-11 | 1993-08-31 | Hino Motors Ltd | Axle shaft and its manufacture |
| KR20040062281A (en) * | 2003-01-02 | 2004-07-07 | 김영기 | Making method of crank shaft and motor shaft |
-
2003
- 2003-01-22 KR KR1020030004356A patent/KR20040067313A/en not_active Application Discontinuation
- 2003-04-03 CN CNB031090656A patent/CN1228555C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108723722A (en) * | 2018-06-29 | 2018-11-02 | 浙江百达精工股份有限公司 | A kind of rotary compressor bent axle blank manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20040067313A (en) | 2004-07-30 |
| CN1228555C (en) | 2005-11-23 |
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Granted publication date: 20051123 Termination date: 20170403 |
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